2288509 has 2 divisors, whose sum is σ = 2288510. Its totient is φ = 2288508.

The previous prime is 2288479. The next prime is 2288527. The reversal of 2288509 is 9058822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1932100 + 356409 = 1390^2 + 597^2 .

It is a cyclic number.

It is not a de Polignac number, because 2288509 - 2¹⁹ = 1764221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2288009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1144254 + 1144255.

It is an arithmetic number, because the mean of its divisors is an integer number (1144255).

2^2288509 is an apocalyptic number.

It is an amenable number.

2288509 is a deficient number, since it is larger than the sum of its proper divisors (1).

2288509 is an equidigital number, since it uses as much as digits as its factorization.

2288509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 2288509 is about 1512.7818745609. The cubic root of 2288509 is about 131.7804162198.

The spelling of 2288509 in words is "two million, two hundred eighty-eight thousand, five hundred nine".